I just loved this book from start to finish. In fact I was disappointed to reach the last page.
As with all of Ben Aaronovitch's characters the people is the book 'jump out'. In a few sentences or a turn of phrase I get a clear impression of the characters and what they are likely to do and feel. I particularly enjoy how minor characters have such a huge impact on the story and often leave me wanting to read books in which they star. I'm thinking of Cocoa and Beauregard.
Gussie and Lucy are two great additions to the list of 'Rivers Alumni'
I have read a review which compares the style of this book unfavourably with PG Wodehouse. I'm a big Wodehouse fan and honestly feel that while he borrows from the style Ben Aaronovitch does it well and with a bit of polish and class.
All in all I'll be reading this book again and eagerly anticipating the next books in this series.